<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>CSS字体属性之文字样式</title>
  <style>
    p {
      font-style: italic;
    }
    em {
      font-style: normal;
    }
  </style>

</head>
<body>
  
  <p>同学，上课时候的你</p>

  <em>下课时候的你</em>
</body>
</html>